Beginning January 2018, the Transportation Security Administration will begin requiring passengers to use IDs that comply with the REAL ID Act, the Department of Homeland Security announced on December 12. This means that residents of nine states will need an an alternate form of ID other than their state-issued ID card. The complete list of acceptable documents is available here and includes a passport, military ID, permanent resident card, and others.
The states that are affected are:
The state-issued ID cards for these states do not comply with the minimum security standards laid out by the REAL ID requirements. States may receive extensions from TSA for compliance under the law, as has happened before. The status of your state’s compliance can be found on TSA’s website, here. In January 2016, the agency had announced its intention to implement the final phase of the REAL ID requirements.